Manufacture of lakes.



w 34 WE 3.12 new DAHL & 00., ACTIEISTGESELLSCHAEET,"

'EEJBT, GERMANY.

roeec e.

No Drawing.

To all whom it may concern 7 Be it known that, I. Enxs'r ULmcHs, a subject of the King of Prussia, and resident of Elherfeld, Province of the Rhine, Germany, have inrentedcertuin new and useful Improvements in the lvlnnufncture of Lakes, of which the following is a Specification.

My invention consists in the production of new lakes which are of a beautiful red shade, being at the same time distinguished by their resistance to water and alcohol, their insolubility in oil, as Well as by their high covering capacity and their excellentfzist color oil-colors.

The method of producing" my new lakes consists in treating the nionoazo dyes produced from diazotized ortho-toluiclin and naphtholsulphonic acid 1.4 with a salt of the heavy metals as, for instance, calciunn'bm rinm and the like.

The dye produced from (hazel-iced orthotoluidin and naphtholsulphonic acid. already known, 'bi1t,being Worthless f dyeing purposes it has never been put the market. from na-phtholsulphonic acid 1.4 however much used for dyeing Wool etc, while they are all unfit for the manufacture of lakes in making experiments in order to ohtnin good lakes I found that the lakes from the dye produced from cliazotiscl ortho-toluidin and nophtholsulphonic acid 1.4, which I manufactured, are of excellent quality as oihcolors, While their very fast color-against light is very astonishino: Furthermore Ifm'as surprised by the fast. color of mv lo-lies because in the German Patent No. 167,497, which 'descril'les hikes made froin the dyes produced from diam. tized ortho-toluidin and nuphtholsulphonic acid 1 and from diuzotizcd orthonnisiclin and na ')l1tholslllphonic ucid L5 it is asserted. t :it the azo dyes produced from other naphtho lsulphonic acids, as for instance, nuphtholsulphonic acid 1.4, 1.3. 1.6 or 1.7 instead of nuphtholsulphonic acid 1.5

Well as the azo dyes, having :is\onc coinpouncl para-phenelidiiu pain-unisidiu, puruzmd 1neta-t0luidin inetuand purmxylidin, anilin or kresidin instead of ortho-toluidiu or oi'l'ho-miisidin. yield lakes which are not; first against light. Contrary to this stair ment 1 found that my new lakes made from the dyes produced from diazotized ortho- Specification of Letters Patent.

Other monoazo dyes mile-w Patented Apr. 9, 159112.

' Application filed August 15, 19B. :ierinl He. fi l- ,116.

toluirlin' and naphtholsulphonic acid 1.4 yield oil-colors which are very fast against light, and "which even surpnssthe oil-color lakes made according to the abovcinentioned German potent.

My new lakes are obtained by producing lhe dye from diazotizcd m-tho-toluidin and naphtholsulphonic acid L4 mid in tl 11 using the usual methods in or er to obtain colon lakes from the dye, oi g. as follows:

EXfiD'l'plG I: A paste containing 3 kg. of the dry clye produced rom dinzotizecl orthotoluidin and insphtholsulphonic acid ml by known methods, carefully stirred with 109 kg. of i sp suspended in Water. A solution 0: hazel calcium chlorid is added and ooiled for a few minutes. The color lake thus obtained is of nice and clear orange-red shade insoluble in 'Wa'teig alcohol and oil. and the oil colors made from itare oil? snexcellcnt covering cnpzici tam-c against the flCi-iGH-Ql l. "l

. of using it ariun: chloritl 13 obtained by this A no color method is of s hluish- The colorlahes oh u or shade, by their resislzmcejto water and alcohol, their imsoluhilit-y in. oil, and the oil colors mode fron i'ein are very fast i zninst light, being Elli-.ilfl. some time of an excellentcores lug; capacity.

lo niunufncturi ig' my new lz'i ulmve processes in aid of heavy sullsl'rutu emph olor-lnltes s' ch as ulumioiiu'n hrdi v used. The nmuu' :cturcof any new lakes umy ulso he carried on finder such conditions' limi the d es tori ;i1i1ulto1ie-ously with illc precipitation oi he lakes, as iescribed in lluited l -llulcs :ii'tlll No. 910,030. I cluiuxt-- ll, moi-esstor the munufiwture of color-- lHlHH. which consists in trenting'thc (lye prw duccd from lizotixed orlhoioloidin and muihtholsul mic acid 1. hem metal A process for the lllilllh'liiitflkll'l) of colon lakes. which consists in iiQili'iIlfJ the dye produced from dinzo'liizerl mtho-toluidin end nupldlmlsulplionic acid 1.4 with calcium suit: i v t is carried out nui soils of 3. As new ar'icles.of manufacture, colorlakes obtained from the dye produced from diazotized ortho-toluidin and na 'ihtholsul ii their fast color against the action of light,

yielding upon reduction by means of tin and hydrochloric acid, ortho-toluidin. and 2 aniido-naphtholsulphonic acid 1.4. i

4. As a new article of manufacture, a color-lake obtained from the calcium salt of the dye produced from 'diazotized. orthotoluidin and nophtholsulphonic acid 1.4, characterlzed by its orange-red shade, 1l5 re- SlSti-HCQ to water and alcohol, its lnsohlbihty in oil and its fast color against thoaction of light, yield ng upon reduction by means of tin and hydrochloric acid, ortho-toluidin and 2 amido-naphtholsulphonic acid 1.4.

In witness Whereof'I have hereunto set my hand in the presence of two Witnesses.

ERNST ULRICHS. [L.s.] Vitnesses: V

CHAS. J. lVRien'r, L. NUFER. 

